Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.

Running Xcode build...                                                  
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
 └─Compiling, linking and signing...                         7.5s
Xcode build done.                                           34.4s
<Google> To get test ads on this device, set: GADMobileAds.sharedInstance.requestConfiguration.testDeviceIdentifiers = @[ kGADSimulatorID ];
flutter: |-->Language: vi                                               
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
Syncing files to device iPhone 12 Pro Max...                       411ms

Flutter run key commands.
r Hot reload. 🔥🔥🔥
R Hot restart.
h Repeat this help message.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

💪 Running with sound null safety 💪

An Observatory debugger and profiler on iPhone 12 Pro Max is available at: http://127.0.0.1:53598/86K7-03DqdI=/
The Flutter DevTools debugger and profiler on iPhone 12 Pro Max is available at:
http://127.0.0.1:9101?uri=http%3A%2F%2F127.0.0.1%3A53598%2F86K7-03DqdI%3D%2F
flutter: |---> Route: /home
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
flutter: --------------> NativeAd failedToLoad: LoadAdError(code: 8, domain: com.google.admob, message: Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target., responseInfo: ResponseInfo(responseId: X0czYfSZENGtwgOm6bmIDg, mediationAdapterClassName: null, adapterResponses: [AdapterResponseInfo(adapterClassName: com.google.DummyAdapter, latencyMillis: 1), description: {
    Credentials =     {
    };
    Error = "Error Domain=com.google.admob Code=8 \"Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.\" UserInfo={NSLocalizedDescription=Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in th<…>
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
flutter: |---> Route: /detail
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.
flutter: InterstitialAd failed to load: LoadAdError(code: 8, domain: com.google.admob, message: Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target., responseInfo: ResponseInfo(responseId: aUczYYj3BMixwgOEhbFg, mediationAdapterClassName: null, adapterResponses: [AdapterResponseInfo(adapterClassName: com.google.DummyAdapter, latencyMillis: 1), description: {
    Credentials =     {
    };
    Error = "Error Domain=com.google.admob Code=8 \"Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.\" UserInfo={NSLocalizedDescription=Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other L<…>
flutter: --------------> NativeAd failedToLoad: LoadAdError(code: 8, domain: com.google.admob, message: Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target., responseInfo: ResponseInfo(responseId: aUczYanUBZawvATU9oywAQ, mediationAdapterClassName: null, adapterResponses: [AdapterResponseInfo(adapterClassName: com.google.DummyAdapter, latencyMillis: 1), description: {
    Credentials =     {
    };
    Error = "Error Domain=com.google.admob Code=8 \"Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.\" UserInfo={NSLocalizedDescription=Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in th<…>
<Google> Cannot find an ad network adapter with the name(s): com.google.DummyAdapter. Remember to link all required ad network adapters and SDKs, and set -ObjC in the 'Other Linker Flags' setting of your build target.

[pynner]

Having same issue with test ad unit ids

[rocboronat]

Exactly the same here. I have the interstitials working but the banner ones launch this error 😢

In addition, just in case, I added -ObjC to my Other Linker Flags setting. Is it really needed? While this error says `Remember to link…", the readme says nothing about it.